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HCD-J3MD
SPECIFICATIONS
SERVICE MANUAL
COMPACT COMPONENT Hi-Fi SYSTEM
AEP Model
UK Model
E Model
Chinese Model
Model Name Using Similar Mechanism HCD-MD373
Mechanism Type
CDM55A-5SBD32
Base Unit Type
BU-5SBD32
Optical Pick-up Type
KSS-213BA/F-NP
Model Name Using Similar Mechanism HCD-MD373
Mechanism Type
MDM-5H
Optical Pick-up Type
KMS-260B/J1N
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type
CMAL1Z027A
CD
SECTION
MD
SECTION
HCD-J3MD is the amplifir, CD, MD, TAPE deck
and tuner section in CMT-J3MD.
CASSETTE
SECTION
-- Continued on next page --


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2
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which
show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box
in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the Self-
Diagnosis Function (Error History Display Mode)".
Note 1: About "R"
As this unit has only a few buttons, some operations require the use of remote commander (RM-SJ373/provided with unit: 1-418-554-11)
buttons. These operations are indicated as "R" in this manual.
Example: MENU/NO "R" ...Press the MENU/NO button of the remote commander.
Note 2:
Incorrect operations may be performed if the test mode is not set properly.
In this case, press the RESET button of the back panel.(Timing of pressing three buttons simultaneously is difficult and will put the
machine into improper mode.)
Procedure for using the Self-Diagnosis Function (Error History Display Mode).
Note: Perform the self-diagnosis function in the "error history display mode" in the test mode. The following describes the least required
procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO "R" button to
exit the mode.
1.
When the power ON, press the ?/1 button while pressing the s button and z TAPE button together.
2.
Press the lm/I/CD/TUNING ­ button or ML/TUNING + button and when "[Service]" is displayed, press the ENTER/
YES "R" button. (If nothing is displayed, press the FUNCTION button and set the function to "MD".)
3.
Press the lm/TUNING ­ button or ML/TUNING + button and display "ERR DP MODE".
4.
Pressing the ENTER/YES "R" button sets the error history mode and displays "total rec".
5.
Select the contents to be displayed or executed using the lm/TUNING ­ button or ML/TUNING + button.
6.
Pressing the SYNCHRO REC button will display the message "CD-MD SYNC ?" and press ENTER/START to show or to execute the
contents selected.
7.
Pressing the SYNCHRO REC button another time returns to step 4.
8.
Pressing the MENU/NO "R" button displays "ERROR DP MODE" and exits the error history mode.
9.
To exit the test mode, press the REPEAT/DOLBY NR/STEREO/MONO button. The unit sets into the STANDBY state, and the test
mode ends.


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3
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode
Display
total rec
total play
retry err
total err
err history
er refresh
tm refresh
Details of History
No error
Read error. PTOC cannot be read
(DISC ejected)
TOC error. UTOC error
(DISC not ejected)
Loading error
Address cannot be read (Servo has deviated)
Displays the recording time.
Displayed as "rh".
The displayed time is the total time the laser is set to the high power state.
This is about 1/4 of the actual recording time.
The time is displayed in decimal digits from 0h to 65535h.
Displays the play time.
Displayed as "ph". The time displayed is the total actual play time. Pauses are not counted.
The time is displayed in decimal digits from 0h to 65535h.
Displays the total number of retries during recording and number of retry errors during play.
Displayed as "r p".
"r" indicates the retries during recording while "p" indicates the retry errors during play.
The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.
Displays the total number of errors.
Displayed as "total ".
The number of errors is displayed in hexadecimal digits from 00 to FF.
Displays the 10 latest errors.
Displayed as "0 [email protected]@".
indicates the history number. The smaller the number, the more recent is the error. (00 is the latest).
@@ indicates the error code.
Refer to the following table for the details. The error history can be switched by pressing the lm/TUNING
­ button or ML/TUNING + button.
Mode which erases the "retry err", "total err", and "err history" histories.
When returning the unit to the customer after completing repairs, perform this to erase the past error history,
After pressing the SYNCHRO REC button and "CD-MD SYNC?" is displayed, press the ENTER/START
button when "er refresh" appears, press ENTER/YES "R" to erase the history.
"Complete!" will be displayed momentarily.
Be sure to check the following when this mode has been executed.
· The data has been erased.
· The mechanism operates normally when recording and play are performed.
Mode which erases the "total rec" and "total play" histories.
These histories serve as approximate indications of when to replace the optical pickup.
If the optical pickup has been replaced, perform this operation and erase the history.
After pressing the SYNCHRO REC button to show "CD-MD SYNC." Press ENTER/START and "tm refresh?"
is displayed, press the ENTER/YES "R" button to erase the history.
"Complete!" will be displayed momentarily.
Be sure to check the following when this mode has been executed.
· The data has been erased.
· The mechanism operates normally when recording and play are performed.
Table of Error Codes
Error Code
E00
E01
E02
E03
E04
E05
E06
E07
E08
E09
E0A
FOK has lost servo lock.
Cannot focus (Servo has lost lock.)
Recording retry
Recording retry error
Playback retry error
(Access error)
Play retry error (C2 error)
Details of Error
Error Code
Details of Error


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4
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK
! OR DOTTED LINE WITH
MARK
! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The
CLASS
1
LASER
PRODUCT MARKING is
located on the rear exterior.
This caution
label is located
inside the unit.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of soldering iron around 270°C
during repairing.
· Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
· Be careful not to apply force on the conductor when soldering
or unsoldering.


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5
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
TABLE OF CONTENTS
1. SERVICING NOTE ·························································· 6
2. GENERAL ........................................................................ 18
3. DISASSEMBLY
3-1. Upper Cover ······························································· 21
3-2. Front Panel Section ····················································· 21
3-3. Panel Board ································································· 22
3-4. Main Board ·································································· 22
3-5. Cassette Machanism ···················································· 23
3-6. Power Transformer/AMP Board ································· 23
3-7. CD Mechanism Deck ·················································· 24
3-8. Tray, Gear and Cam ····················································· 24
3-11. BD (CD) Board, Spindle Motor (M101) and
Sled Motor (M102) ······················································ 25
3-9. CD Base Unit ······························································ 25
3-10. Optical Pick-Up Section Of CD
(KSS-213BA/F-NP) ···················································· 25
3-12. MD Mechanism Deck ················································· 26
3-13. Slider (Cam) ································································ 26
3-14. Base Unit (MBU-5A) and BD (MD) Board ················ 27
3-15. Over Write Head ·························································· 27
3-16. Optical Pick-Up Of MD (KMS-260B/J1N) ················ 27
3-17. Spindle Motor (M901) and
Sled Motor (M902) (MD) ············································ 28
4. TEST MODE .................................................................... 29
5. ELECTRICAL ADJUSTMENTS34
6. DIAGRAMS
6-1. Block Diagrams
­ BD (CD) Section ­ ··················································· 45
­ BD (MD) Section (1/2) ­ ·········································· 46
­ BD (MD) Section (2/2) ­ ·········································· 47
­ Main Section ­ ························································· 48
6-2. Circuit Boards Location ·············································· 49
6-3. Printed Wiring Board ­ BD (CD) Section ­ ················ 50
6-4. Schematic Diagram ­ BD (CD) Section ­ ··················· 51
6-5. Printed Wiring Board ­ BD (MD) Section ­ ··············· 52
6-6. Schematic Diagram ­ BD (MD) Section (1/2) ­ ········· 53
6-7. Schematic Diagram ­ BD (MD) Section (2/2) ­ ········· 54
6-8. Schematic Diagram ­ MAIN Section (1/2) ­ ·············· 55
6-9. Schematic Diagram ­ MAIN Section (2/2) ­ ·············· 56
6-10. Printed Wiring Board ­ MAIN Section ­ ···················· 57
6-11. Printed Wiring Board ­ MD DIGITAL Section ­ ······· 58
6-12. Printed Wiring Board ­ MD DIGITAL Section ­ ······· 59
6-13. Printed Wiring Board ­ AMP Section ­ ······················ 60
6-14. Schematic Diagram ­ AMP Section ­ ························· 61
6-15. Printed Wiring Board
­ CASSETTE DECK Section ­ ·································· 62
6-16. Printed Wiring Board
­ CASSETTE DECK Section ­ ·································· 63
6-17. Printed Wiring Board ­ PANEL Section ­ ·················· 64
6-18. Schematic Diagram ­ PANEL Section ­ ···················· 65
6-19. Printed Wiring Board ­ POWER Section ­ ················· 66
6-20. Schematic Diagram ­ POWER Section ­ ·················· 67
6-21. Schematic Diagram ­ BD SWITCH Section ­ ·········· 68
6-22. Printed Wiring Board ­ BD SWITCH Section ­ ········· 68
6-23. Schematic Diagram ­ LOADING Section ­ ·············· 68
6-24. Printed Wiring Board ­ LOADING Section ­ ············ 68
6-25. IC Block Diagrams ······················································ 69
6-26 IC Pin Fuction Description ·········································· 74
7. EXPLODED VIEWS
7-1. Case and Casette Mechanism Deck
Section (CMAL1Z027A) ············································ 79
7-2. Front Panel Section ····················································· 80
7-3. Chassis Section ···························································· 81
7-4. Md Mechanism Deck Section-1 (MDM-5H) ·············· 82
7-5. Md Mechanism Deck Section-2 (MBU-5A) ··············· 83
7-6. CD Mechanism Deck Section-1
(CDM55A-5SBD32) ··················································· 84
7-7. CD Mechanism Deck Section-2 (BU-5SBD32) ·········· 85
8. ELECTRICAL PARTS LIST ······································· 86